Green Watchtower enters the battlefield tapped unless you pay .
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
: Green Watchtower becomes a 2/1 green and white Leech creature until end of turn. It's still a land.
.
: Add to your mana pool.: Add 
or 
to your mana pool. Each opponent gains 1 life.: Green Watchtower becomes a 2/1 green and white Leech creature until end of turn. It's still a land.
